CN106695079A - Welding method of double-metal composite pipe - Google Patents

Welding method of double-metal composite pipe Download PDF

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Publication number
CN106695079A
CN106695079A CN201710126833.6A CN201710126833A CN106695079A CN 106695079 A CN106695079 A CN 106695079A CN 201710126833 A CN201710126833 A CN 201710126833A CN 106695079 A CN106695079 A CN 106695079A
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CN
China
Prior art keywords
welding
groove
basic unit
bimetal pipe
composite bimetal
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Application number
CN201710126833.6A
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Chinese (zh)
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CN106695079B (en
Inventor
韩彬
王勇
韩浩
李立英
赵卫民
李美艳
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China University of Petroleum UPC East China
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China University of Petroleum UPC East China
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/16Arc welding or cutting making use of shielding gas
    • B23K9/167Arc welding or cutting making use of shielding gas and of a non-consumable electrode
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/16Arc welding or cutting making use of shielding gas
    • B23K9/173Arc welding or cutting making use of shielding gas and of a consumable electrode
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/23Arc welding or cutting taking account of the properties of the materials to be welded
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00Arc welding or cutting
    • B23K9/235Preliminary treatment
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00Articles made by soldering, welding or cutting
    • B23K2101/04Tubular or hollow articles
    • B23K2101/06Tubes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2103/00Materials to be soldered, welded or cut
    • B23K2103/16Composite materials, e.g. fibre reinforced
    • B23K2103/166Multilayered materials

Abstract

The invention discloses a welding method of a double-metal composite pipe. The welding method comprises the following steps: (1) welding groove treatment: a basic welding surface is machined; a groove is a Y-shaped groove; a single-edge groove angle beta is 30+-5 degrees; and an obtuse edge thickness h is 2-4 mm; (2) prewelding: the TIG or MIG welding is performed; and a lining layer is prevented from being molten in the welding process; (3) the fill welding is performed; (4) welding of the lining layer: the low-current TIG welding is adopted; and (5) the cover surface welding is performed. The welding method improves the joint corrosion resistance, and is simple and convenient in welding process, high in welding efficiency, low in welding cost, free of crisp and hard layers in welding lines and excellent in welding line quality.

Description

The welding method of composite bimetal pipe
Technical field
The invention belongs to welding engineering field, in particular it relates to a kind of welding method of composite bimetal pipe.
Background technology
Composite bimetal pipe is, with carbon steel or low alloy steel as basic unit, with stainless steel or nickel-base alloy as inner liner, to pass through Specific moulding process, the composite steel tube for combining to form is broadly divided into mechanical composite tube and metallurgical composite pipe.Its comprehensive base tube The antiseptic property of mechanical performance and internal lining pipe corrosion resistant alloy, is widely used in the industries such as oil, chemical industry and electric power in recent years.It is existing Composite bimetal pipe weld due to being limited by its space structure, use unilateral welding procedure, i.e., first weld cladding, then Weldering transition zone, finally welds the welding sequence of basic unit.The selection of welding material generally has two ways, and one kind is to use all steel Or Ni-based wlding, this kind of selection mode weldquality is preferable and is easy to ensure, but welding cost is very high;Another kind is using various Wlding is welded, and because the most parts of weld seam use carbon steel wlding, welding cost is substantially reduced, but because using in high-grade material Upper built-up welding inferior grade wlding, can produce brittle layer, the performance reduction of joint in weld seam.Simultaneously as welded using one side, after The thermal process again of continuous welding process Jun Shiduiqian roads weld seam, prime coat often occurs superheating phenomenon, especially for thin-walled Composite bimetal pipe, this greatly reduces the corrosion resisting property of weld seam.
The content of the invention
Be the defect for overcoming prior art to exist, the present invention provide a kind of composite bimetal pipe (including mechanical composite tube and Metallurgical composite pipe) welding method, can solve that composite bimetal pipe one side weld welding cost is high, joint quality is low and weld seam is resistance to The problems such as erosion difference.
To achieve the above object, the present invention uses following proposal:
The welding method of composite bimetal pipe, comprises the following steps:
Step one, welding groove treatment;
Step 2, prewelding;
Step 3, filling weldering;
Step 4, inner liner welding;
Step 5, cosmetic welding.
Compared with prior art, the invention has the advantages that:Basic unit is welded using carbon steel and low-alloy wlding, weldering Connect low cost;Basic unit separately welds with inner liner, does not have transition zone, and welding operation is simple, and welding efficiency is high;Without using in height Built-up welding inferior grade wlding in grade material, in the absence of brittle layer;Inner liner is last welding position, using low current TIG or MIG welderings are once soldered, and not only thermal weld stress amount is small, and avoids the superheating phenomenon that follow-up welding operation is caused to it, weldering Connect quality good, corrosion resisting property is high.
Brief description of the drawings
Fig. 1 is the Y type groove schematic diagrames of composite bimetal pipe;
Fig. 2 is composite bimetal pipe welding procedure schematic diagram;
In figure:1st, basic unit, 2, inner liner, the 3, first layer, the 4, second layer, the 5, the 3rd layer, the 6, the 4th layer, 7, Five layers.
Specific embodiment
In order that present invention solves the technical problem that, technical scheme and beneficial effect more clear and definite, below in conjunction with Accompanying drawing embodiment is described in further detail to the present invention, the welding method of the composite bimetal pipe, comprises the following steps:
Step one, welding groove treatment, its processing procedure are as follows:
101st, retaining wall on slope treatment, groove are carried out to the solder side of composite bimetal pipe basic unit 1 using mach mode Form is Y type grooves, and angle of bevel β is 30 ° ± 5 °, and root face height h is 2~4mm, refers to Fig. 1;
102nd, groove cleaning:Using wire brush and alcohol to being polished and being cleaned in the range of groove and its neighbouring 25cm, The adverse effect for preventing greasy dirt and iron rust from being caused to weld seam;
103rd, groove group pair:Check retaining wall on slope quality, it is ensured that groove and its near zone it is intact after carry out groove group Right, groove group is 2~5mm to gap;
Step 2, prewelding:Under inert gas shielding, prewelding is carried out to basic unit 1 using TIG or MIG welderings, form the first layer 3, wlding used is the welding wire close with the same material of basic unit 1 or composition, and welding current is 100~140A, argon flow amount is 8~ 12L/min;Small current welding is used in welding process, prevents heat input excessive so that inner liner 2 melts, so as to produce brittle Tissue;
Step 3, filling weldering:Weldering is filled to basic unit 1 using manual electric arc welding or gas metal-arc welding (MAG), The second layer 4 and the 3rd layer 5 are formed, the wlding for being used is the welding rod or welding wire close with the same material of basic unit 1 or composition, hand Work arc welding electric current is 75~105A, and MAG weldering electric currents are 135~170A, gas flow 18L~22L/min;
Step 4, inner liner welding:Under inert gas shielding, inner liner 2 is welded using TIG or MIG internal welding machines, The 4th layer 6 is formed, the wlding for being used is the stainless steel or nickel-based welding wire with the same material of inner liner 2 or a grade high, welded Electric current is 80~110A, and argon flow amount is 8~12L/min;In welding process, used as far as possible on the premise of penetration is ensured Small current welding, prevents welding current excessive, causes dilution rate to become big and beneficial element scaling loss, reduces the corrosion resisting property of weld seam;
Step 5, cosmetic welding:Cosmetic welding is carried out to basic unit 1 using manual electric arc welding, the 5th layer 7 is formed, is used The wlding welding rod used with filling weldering is identical, and welding current is 80~115A;Whole welding process refers to Fig. 2.
The above, the only present invention preferably specific embodiment, but protection scope of the present invention is not limited thereto, Any one skilled in the art the invention discloses technical scope in, technology according to the present invention scheme and its Design is subject to equivalent or change, should all be included within the scope of the present invention.

Claims (6)

1. a kind of welding method of composite bimetal pipe, it is characterised in that comprise the following steps:
Step one, welding groove treatment;
Step 2, prewelding;
Step 3, filling weldering;
Step 4, inner liner welding;
Step 5, cosmetic welding.
2. the welding method of composite bimetal pipe according to claim 1, it is characterised in that step one processing procedure is such as Under:
101st, retaining wall on slope treatment, groove type are carried out to the solder side of composite bimetal pipe basic unit 1 using mach mode It is Y type grooves, angle of bevel β is 30 ° ± 5 °, and root face height h is 2~4mm;
102nd, groove cleaning:Using wire brush and alcohol to being polished and being cleaned in the range of groove and its neighbouring 25cm, prevent The adverse effect that greasy dirt and iron rust are caused to weld seam;
103rd, groove group pair:Check retaining wall on slope quality, it is ensured that groove and its near zone it is intact after carry out groove group pair, slope Mouth group is 2~5mm to gap.
3. the welding method of the composite bimetal pipe according to claim 1-2, it is characterised in that step 2 method is as follows: Under inert gas shielding, prewelding is carried out to basic unit using TIG or MIG welderings, form the first layer, wlding used is and the same material of basic unit Matter or the close welding wire of composition, welding current are 100~140A, and argon flow amount is 8~12L/min;Using small in welding process Electric current is welded.
4. the welding method of the composite bimetal pipe according to claim 1-3, it is characterised in that step 3 method is as follows: Weldering is filled to basic unit using manual electric arc welding or gas metal-arc welding (MAG), the second layer and the 3rd layer is formed, The wlding for being used is the welding rod or welding wire close with basic unit's same material or composition, and manual electric arc welding electric current is 75~105A, MAG Weldering electric current is 135~170A, gas flow 18L~22L/min.
5. the welding method of the composite bimetal pipe according to claim 1-4, it is characterised in that step 4 method is as follows: Under inert gas shielding, inner liner 2 is welded using TIG or MIG internal welding machines, form the 4th layer, the wlding for being used It is the stainless steel or nickel-based welding wire with inner liner same material or a grade high, welding current is 80~110A, argon flow amount is 8~ 12L/min;In welding process, small current welding is used as far as possible on the premise of penetration is ensured.
6. the welding method of the composite bimetal pipe according to claim 1-5, it is characterised in that step 5 method is as follows: Cosmetic welding is carried out to basic unit using manual electric arc welding, the 5th layer, the wlding for the being used welding rod used with filling weldering is formed Identical, welding current is 80~115A.
CN201710126833.6A 2017-03-06 2017-03-06 The welding method of composite bimetal pipe Active CN106695079B (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107030359A (en) * 2017-06-01 2017-08-11 中国石油大学(华东) Bimetallic mechanical is combined tube end resistance spot welding process
CN107252977A (en) * 2017-07-21 2017-10-17 上海交通大学 A kind of single fillet welded methods of laser+MIG/MAG
CN108500429A (en) * 2018-06-07 2018-09-07 中国石油大学(华东) A kind of welding method of composite bimetal pipe
CN108907419A (en) * 2018-07-20 2018-11-30 四川汇源钢建装配建筑有限公司 A kind of single V groove with root face welding method and weldment
CN110216357A (en) * 2019-05-28 2019-09-10 中钢不锈钢管业科技山西有限公司 A kind of manufacturing method of bimetallic composite welded pipe
CN111014899A (en) * 2019-12-20 2020-04-17 中国人民解放军63926部队 High-temperature-resistant steel butt welding method
CN111673217A (en) * 2020-05-11 2020-09-18 首钢集团有限公司 Method for welding composite board on single surface by adopting ceramic liner
CN111843105A (en) * 2020-07-28 2020-10-30 沧州隆泰迪管道科技有限公司 Automatic backing welding process for prefabrication of bimetal composite pipeline

Citations (8)

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Publication number Priority date Publication date Assignee Title
GB1207675A (en) * 1967-03-16 1970-10-07 Int Combustion Holdings Ltd Improvements in or relating to methods and apparatus for the manufacture of composite metal tubing
JPH11129068A (en) * 1997-10-29 1999-05-18 Kawasaki Steel Corp Circumferential welding for pipe line fixed pipe
CN101633074A (en) * 2009-07-16 2010-01-27 西安交通大学 Welding method of girth weld of inner cladding thin-walled stainless steel composite tube
CN104191072A (en) * 2014-08-14 2014-12-10 梧州市旺捷机械制造有限公司 Welding method of stainless steel clad plate
CN104801826A (en) * 2015-03-24 2015-07-29 中国海洋石油总公司 Bimetal composite pipe both-side welding process
CN104942414A (en) * 2015-06-16 2015-09-30 中石化石油工程机械有限公司沙市钢管厂 Double-metal composite plate submerged arc welding technology
CN105108284A (en) * 2015-08-10 2015-12-02 安徽富煌钢构股份有限公司 Composite board welding method
CN105772904A (en) * 2016-05-14 2016-07-20 山西阳煤化工机械(集团)有限公司 Butt welding method of small-diameter composite pipes

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1207675A (en) * 1967-03-16 1970-10-07 Int Combustion Holdings Ltd Improvements in or relating to methods and apparatus for the manufacture of composite metal tubing
JPH11129068A (en) * 1997-10-29 1999-05-18 Kawasaki Steel Corp Circumferential welding for pipe line fixed pipe
CN101633074A (en) * 2009-07-16 2010-01-27 西安交通大学 Welding method of girth weld of inner cladding thin-walled stainless steel composite tube
CN104191072A (en) * 2014-08-14 2014-12-10 梧州市旺捷机械制造有限公司 Welding method of stainless steel clad plate
CN104801826A (en) * 2015-03-24 2015-07-29 中国海洋石油总公司 Bimetal composite pipe both-side welding process
CN104942414A (en) * 2015-06-16 2015-09-30 中石化石油工程机械有限公司沙市钢管厂 Double-metal composite plate submerged arc welding technology
CN105108284A (en) * 2015-08-10 2015-12-02 安徽富煌钢构股份有限公司 Composite board welding method
CN105772904A (en) * 2016-05-14 2016-07-20 山西阳煤化工机械(集团)有限公司 Butt welding method of small-diameter composite pipes

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107030359A (en) * 2017-06-01 2017-08-11 中国石油大学(华东) Bimetallic mechanical is combined tube end resistance spot welding process
CN107030359B (en) * 2017-06-01 2020-01-14 中国石油大学(华东) Bimetal mechanical composite pipe welding process
CN107252977A (en) * 2017-07-21 2017-10-17 上海交通大学 A kind of single fillet welded methods of laser+MIG/MAG
CN107252977B (en) * 2017-07-21 2019-03-12 上海交通大学 A kind of single fillet welded method of laser+MIG/MAG
CN108500429A (en) * 2018-06-07 2018-09-07 中国石油大学(华东) A kind of welding method of composite bimetal pipe
CN108907419A (en) * 2018-07-20 2018-11-30 四川汇源钢建装配建筑有限公司 A kind of single V groove with root face welding method and weldment
CN110216357A (en) * 2019-05-28 2019-09-10 中钢不锈钢管业科技山西有限公司 A kind of manufacturing method of bimetallic composite welded pipe
CN111014899A (en) * 2019-12-20 2020-04-17 中国人民解放军63926部队 High-temperature-resistant steel butt welding method
CN111673217A (en) * 2020-05-11 2020-09-18 首钢集团有限公司 Method for welding composite board on single surface by adopting ceramic liner
CN111843105A (en) * 2020-07-28 2020-10-30 沧州隆泰迪管道科技有限公司 Automatic backing welding process for prefabrication of bimetal composite pipeline

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